It was narrated that ‘Abeedah said:
We used to think that the middle prayer was Fajr prayer. Then `Ali (رضي الله عنه) told us that on the day of al-Ahzab they fought and were distracted from ‘Asr prayer. The Prophet (ﷺ) said: `O Allah, fill their graves with fire - or fill their bellies with fire - as they kept us from the middle prayer.` Then on that day we realised that the middle prayer was ’Asr prayer.